Genuine
Forgery A
Click image for plain view
There is no text lower left
This stamp is comb perfed.
That means that the lines of perf holes merge
at the corners so there is a perf hole at each exact corner
There is a serif at the top of the P of EUROPA
PTAS at bottom is clear with serifs.
This stamp says FAUX at lower left.
FAUX could be removed or covered by a cancel.
This stamp is line perfed.
Perfs do not meet exactly at corners.
Bibliography
The Work of Jean De Sperati by the British Philatelic Association 1955
Album Weeds by Rev. R. B. Earee
The Serrane Guide by Fernand Serrane
The Forged Stamps of all Countries by J. Dorn